Sapkota, Arati, Ram Kumar Shrestha, and Devraj Chalise. “Response of Maize to the Soil Application of Nitrogen and Phosphorous Fertilizers”. International Journal of Applied Sciences and Biotechnology 5, no. 4 (December 24, 2017): 537-541. Accessed July 21, 2019. https://www.nepjol.info/index.php/IJASBT/article/view/18777.